Dilation Effect Douglas R. Mason PB 1st Ballantine yellow dot

Horizon Alpha Douglas R. Mason PB 1st Ballantine (1971)

Satellite 54 Zero Douglas R. Mason PB 1st Ballantine (1971)

DOUGLAS R. MASON Dilation Effect - US 1971 Ballantine 1st print - vintage Sci-Fi

Dilation Effect by Douglas R. Mason - pb

Douglas R Mason - Satellite 54 - Zero - Ballantine Books - 1971 Vintage Scifi

The Two Towers | J.R.R. Tolkien | Ballantine PB | 1971

Eight Against Utopia Douglas R. Mason PB 1st Paperback Library (1967)